Description

For a sphere with radius r, the volume is calculated by the formula:

V = (4/3) π r³

Here, π is taken as 3.14. Given r, the radius of the sphere, as a double type. Calculate the volume V of the sphere, rounded to 2 decimal places.

Input Format

The input is a non-negative real number not exceeding 100, representing the sphere's radius, of type double.

Output Format

Output a real number, the volume of the sphere, rounded to 2 decimal places.

4

267.95